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NAHP NRCMA Exam - Topic 3 Question 28 Discussion

Posted by William on Aug 13, 2025 at 10:50 PM

When using a microscope with a 10X ocular and the 40X objective in place, the total magnification is

Suggested Answer: D

When using a microscope with a 10X ocular lens and a 40X objective lens in place, the total magnification is 400X. This is calculated by multiplying the magnification of the ocular lens by the magnification of the objective lens (10X * 40X = 400X).


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23 comments · newest first
WI
Wilda 9 months ago
I thought it was 50X at first, but it's 400X.
JE
Jeff 9 months ago
Wait, is it really that high? Sounds surprising!
TU
Tu 10 months ago
Definitely 400X, no doubt about it.
BE
Bernadine 10 months ago
10X times 40X equals 400X, simple math!
DA
Daniela 11 months ago
Total magnification is 400X!
VI
Vincenza 11 months ago
I recall that the total magnification is usually a straightforward calculation, but I might be mixing it up with something else. Is it really 400X?
JU
Juliann 11 months ago
I practiced a similar question, and I feel like the answer is definitely not 50X or 40X. It has to be higher than that.
JU
Julio 11 months ago
I'm not entirely sure, but I remember something about total magnification being a simple multiplication. Could it be 400X?
WI
Willard 11 months ago
I think the total magnification is calculated by multiplying the ocular and objective lenses, so it should be 10X times 40X, right?
WI
Willodean 12 months ago
Hmm, I'm not sure about this one. I know the formula, but I'm second-guessing myself on the actual numbers. I think I'll just go with my first instinct and select 400X, but I'm not 100% certain.
RO
Rodney 12 months ago
The total magnification is 400X. That's easy to calculate - the ocular is 10X and the objective is 40X, so the total is just 10 * 40 = 400X. I'm pretty confident in that answer.
DE
Denny 12 months ago
I'm a bit confused on this one. I know the total magnification is the product of the ocular and objective, but I'm not sure if that's 400X or something else. I'll have to double-check the formula.
CA
Carey 1 year ago
Okay, let's think this through step-by-step. The question is asking about the total magnification when using a 10X ocular and a 40X objective. To find the total magnification, we multiply the ocular and objective magnifications, so that should be 10X * 40X = 400X.
JO
Jolanda 1 year ago
Wait, is this a trick question? I'm going with C, just to be safe. 30X sounds about right.
BR
Brittni 1 year ago
I agree with James, the total magnification is calculated by multiplying the magnification of the ocular lens (10X) with the magnification of the objective lens (40X). So it's D) 400X.
KA
Katy 1 year ago
Hmm, I thought it would be 50X. But I guess the math checks out. D it is.
JA
James 1 year ago
I think it's D) 400X because you multiply the magnification of the ocular lens with the magnification of the objective lens.
LE
Leila 1 year ago
Easy! It's 400X. The 10X ocular and 40X objective give you the total magnification. D is the correct answer.
HE
Herman 9 months ago
↳ replying to Leila
I got confused at first, but 400X makes sense!
MA
Marjory 10 months ago
↳ replying to Leila
Definitely! 10X times 40X equals 400X.
FL
Floyd 10 months ago
↳ replying to Leila
I think it's 400X too!
AN
Antione 10 months ago
↳ replying to Leila
Easy calculation! D is the way to go.
RO
Rodolfo 1 year ago
D) 400X
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